kawasaki zx12r

So, I’m 21 and my father recently passed away. I inherited his Kawasaki zx12r made in 2000. I always was interested in riding motorcycles, and have never been a person who just rides or drives anything at careless speed. That being said my father as well as other people have always told me that...

I was looking for used bikes and I came across a Kawasaki 2003 ZX12R. It had an elongated swing arm. I think it looks pretty cool actually. Can anyone tell me the purpose of a longer swing arm?